Weft-detecting mechanism



April 21, 1925. 1,534,249

E. H. RYON WEFT DETECTING MECHANISM Filed May 17, 1921 2 Sheets-Sheet l April 21, 1925..

1,534,249 E. H. RYON WEFT DETECTING MECHANISM Filed May 17, 1921 2 Sheets$heet 2 5 State of li lassachusetts,

Patented Apr. El, 1925.

iJNiTED STATES E 1 so liens EPPA H. RYON, OF WAL'IEHAM, MASSAQHUSETTS. ASSIGNOB- TO CROMPTON & KNOWLES LOOIVI WORKS, OF EVORCESTER, MASSACHUSETTS, A CORPORATION OF Ii'IASSA- CHUSETTS.

FEET-DETECTING MECHANISM.

Application filed. May 17, 1921'. Serial No. 470,335.

To all ic/1 m it may, concern Be it known that I, Erna H. Bron, a citizen of the United States, residing at Vi altham, in the county of Middlesex and rave invented a new and useful eft-Detecting lvfechanism, of which the following is a specification.

This invention relates to weft detecting mechanisl'n used to indicate weft exhaustion in an automatic loom and particularly concerns changes and in'iprovements in detecting mechanism using multiple detecting elements, as shown inmy prior Patent No. 1.221.768 issued April 3, 1917.

it is an important object of my invention to provide a construction by which de tee-ting mechanism of this type may be used to indicate a weft. carrier transfer to be completed on the same beat of the lay in which weft; exhaustion is detected.

Another object is to provide a detecting mechanism for use in connection with trans fer mechanism of the type shown in my prior Patent No. 1932;?09 issued July 16,

191:2, but in which the actuating parts are 39 and; combinations of 55 receives motion from normally maintained in inoperative relation.

Vi'ith these and other objects in view my invention consists in certain arrangements parts which will be hereinafter described and more particularly pointed outin the appended claims.

A preferred form of my invention shown in the drawings in which l ig. 1 is a sideelevation of my detecting mechanism;

Fig. 2 is a partial side elevation showing certain of the parts in a different position;

Fig. 3 is a rear elevation of the detecting mechanism Fig. 1- is a front elevation.thereof. and

g. is a detail view c' certain parts 3 but in a diil'erent position. lcferring to the improved drawings, 1 have shown portions of a loom frame supporting a stud 11 upon which is mounted a transferrer 12. A bracket 13 is also secured to the looni franiie and supports a casting or stand 1 1 upon which the several parts of the detecting mechanism are supported. An L-shaped plunger 15 is mounted to slide vertically in guideways in the stand 1 and is regularly reciprocated by a link 16 which any suitable driving mechanism, not shown. One form of such driving mechanism is clearly disclosed in my prior Patent No. 1,032,709 previously mentioned.

The upper end of the plunger 15 is formed as a hook 1? (Fig. 1) where it adapted to engage a .hook 1S pivoted a. 19 on the transferrer 12. A bolt 20 extends through an upward extension 21 of the hook 153 and also through a lug 22 on the t'ansferrcr 12 and limits movement of the hook 18 away from the hook 117. A sp 'ing on the bolt 20 yieldingly maintains the hook 18 in the position shown in Fig. 1.

A rod 21 (Fig. 3) is also mounted to slide vertically in the stand 1d and downward movement thereof is limited by the engagement of the lug 25 on the plunger with an adjustable stop screw 26 threaded into a projection on the stand 14. A spring surrounds the rod 24: and is positioned be tween a lower surface of the stand 1 and a washer 28 secured on the rod by a pin A lifting stud 30 (Fig. 1) is adjustably secured in the horizontal extension 31 of the plunger 15 and engages the rod El i as the plunger 15 moves upward, the parts being again separated as the plunger moves downward as clearly shown in Fig.

An arm 32 (Fig. 2) is pivoted at to the upper end of the rod 24: and is provided with an adjustable contact crew positioned to engage the hook 18. A projection extends laterally from the arm :32 and a portion thereof engages a shoulder 236 on the head of the rod 2% which thus forms a stop for the arm 32.

The weft engaging mechanism shown herein comprises a series of detecting members 37 Fig. 1) each preferably comp. ing a single ti-shaped piece of w re s ably mounted in a holder 38. 'l e holder has a head portion 31) in which is formed a groove or notch O 1) fitting a horn zontal projection it on the stand 1 1. .1 bolt 4:2 extends loosely through the head 39 and stand l t and a spring on the boltretains the holder yieldingly in position on the stand.

The detecting members are normally maintained in their rearward or operative position by a spring plate 44 (Fig. 1) fixed to a blocx 415 loosely pivoted on a stud 46 which is secured in a projection 47 of the stand it by a set screw 4:8. A light spring 4:9 is coiled aro und a reduced hub portion of the block 45 and one end thereof is se cured to a cross pin 50 fixed in the stud l6. The other end of the spring is secured to the block 15. The effect of the spring may be easily adjusted by loosening the set screw 48 and turning the stud 46 to increase or decrease the tension of the spring.

lVhen the detecting-members are in their rearward or operative position, the lower and. shorter legs of the detecting members extend into the path of the projection 35 on the arm as shown in Fig. 2. lVhen engaged by a weft carrier having a sulficient supply of weft thereon, the detecting members are moved forward therebyvout ot' the path of the projection 35.

The mechanism is commonly used with weft carriers or bobbins having a plurality of transverse holes therein, as shown in m prior Patent No. 1,220,685 issued March 27, 1917. Some one of the weft detecting n1embers 37 will enter a hole in the bobbin as soon as it is uncovered by substantial exhaustion oi the weft covering the same and will remain in such rearward or operative position for engagement by the projection 35 as the rod 24 descends. This engagement causes a swinging movement of the arm 32 which advances the hook 18 into the path of the hook by which the transferrer is thereupon operated to insert a fresh weftcarrier in the shuttle.

It is essential that all of the detecting members 37 should be withdrawn during the transfer operation and for this purpose I provide a bell crank 51 (Fig. 1) also pivoted on the stud 46 and having" a pin 52 extending behind the upright portions of the detecting members 37. The trans ft'errer 12 is provided with a. depending arm 53 having a stud 54.- which engages the bell crank 51 as the transferrer moves down we d and swings the bell crank to withdraw the members from their rearmost or operative position so that they will not'be engaged by the fresh weft carrier as it enters the shuttle.

The bell crank may also ientl grasped by the loom operator when ever it is desired to temporarily prevent. operation ot the detecting mechanism as, tor instance, upon starting a loom after the insertion of a new warp.

llaving thus described my invention and the operation thereof it will be evident that changes and modifications can be made therein by those skilled in the art within the spirit and scope of my invention as set forth in the claims, and I do not wish to be otherbe conven wise limited to the details herein disclosed but what I claim is v 1. In a loom, in combination, a transferrer, an actuating device therefor having a regularly repeated operative movement, a normally inoperative connector between said transferrer and said operative device, and means to move said connector to operative position upon indication of substantial exhaustion of weft on the active weft carrier.

2. In a loom, in combination, a transferrer, anactuating device therefor having a regularly repeated operative movement, a normally inoperative connector between said translerrer and said operative device, a positioning device for said connector also having regularly repeated operative movcments, and a weft detecting element effective to cause additional movement of said positioning device to advance said connector to operative position upon substantial exhaustion of weft on the active weft carrier.

3. In a loom, in combination, a transferrer, a regularly actuated plunger having ahooked upper end, a hook pivoted to said transferrer for engagement by said plunger, a rod movable by said plunger, an arm pivoted thereto and engaging said hook, said arm having aprojection, and a detecting member normally positioned in the path of said projection but movable from such position by engagement with a weft carrier having a sutlicieut supply or? wett thereon.

4 In a loom, a plurality of wei't detecting elements, a spring plate yieldingiy holding all of said elements in operative position, a transferrer having a depending arm and av lever movable by said arm and having a pin directly engaging all o lsaid detecting elements. and effective to withdraw said elements from operative posi tion when the transt'errer is actuated.

5. lVe'lit detecting mechanism COHllJl'lSlDL-f a holder, a plurality of weft detecting elements slidable in said holder, said elementsbeing each formed from a single U-shaped piece of wire with legs of unequal length, lllGflTlSiLO' indicate transfer upon ment oi" said means'by the end of the shorter leg Oli any one of said elements, and means directly ens agring all of said elements and effective to slide said elements forward in said holder out of operative po sition during weft carrier transl er.

In testimony whereof I have hereunto atiixed my signature. 7

EPPA ll. RYON. 

